#include<conio.h>
#include<stdio.h>
#include<iostream.h>
main(){
int a[3];
for (int i=0;i<3;i++){
cout<<"Masukkan angka "<<i+1<<" : ";
cin>>a[i];
}
int x;
for (int i=0;i<2;i++)
for (int j=i+1;j<3;j++){
if (a[i]>a[j]){
x=a[i];
a[i]=a[j];
a[j]=x;
}
}
cout<<"\nTertinggi : "<<a[2];
cout<<"\nTengah : "<<a[1];
cout<<"\nTerendah : "<<a[0];
getche();//header conio.h
}
Sumber : http://ilmusayabagi.blogspot.com/2013/03/c-mencari-nilai-tertinggi.html